A revision of the flea genus Thrassis Jordan 1933 (Siphonaptera: Ceratophyllidae), with observations on ecology and relationship to plague - Stark, Harold E., 1920- (Berkeley, University of Califronia Press, 1970)
"Comparison of variable characters of subgenera, species and subspecies of Thrassis males [and females]" 2 fold. leaves (in pocket)
Bibliography: p. 174-184.
Keywords: Thrassis; Fleas as carriers of disease